Cirsotrema
- Dataset
- Undercover speciation of wentletraps (Caenogastropoda: Epitoniidae) in the Southwestern Atlantic
- Rank
- GENUS
Classification
- kingdom
- Animalia
- phylum
- Mollusca
- class
- Gastropoda
- family
- Epitoniidae
- genus
- Cirsotrema
discussion
Remarks. Scalaria fenestrata Strebel, 1908 appears at present as a junior (primary) homonym of Scalaria fenestrata Meneghini in de Stefani, 1875 and Scalaria fenestrata Wöhrmann, 1889. Due to the above, “ Cirsotrema ” georgeanum is here proposed as a replacement name for Strebel’s species. In shell morphology, “ Cirsotrema ” georgeanum resembles “ Cirsotrema ” magellanicum; both species reach large sizes, and are sculptured with widely separated, lamellate axial ribs, with low but strong spiral elements in the interspaces of axial sculpture, and with a prominent spiral cord at the base. In fact, Brown & Neville (2015) suggested that both are probably synonyms. However, “ Cirsotrema ” georgeanum differs from “ Cirsotrema ” magellanicum by being slender, with whorls separated by a deeper suture, axial ribs with prominent coronations, and by lacking the auriculate peristome that is present in “ Cirsotrema ” magellanicum. Given these differences, both taxa are here regarded as distinct.
etymology
Etymology. The name of the species refers to its provenance.
materials_examined
Type locality. 54 ° 11 ’ S 36 ° 18 ’ W, Cumberland Bay, South Georgia 252 – 310 m. Type material. Two syntypes (one syntype at SMNH type- 918: Fig. 10 A; the other syntype at ZMH 3139: Fig. 10 B, C). Known distribution. Only known from South Georgia.